Bohler-Uddeholm,BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube,Pipe

Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube Product Information -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Böhler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel** ## **Product Overview** **BÖHLER W302 SUPERIOR®** is a premium-grade **chromium-molybdenum-vanadium hot work tool steel** that elevates the standard AISI H13 specification through advanced manufacturing and quality control processes. The **SUPERIOR®** designation represents Böhler-Uddeholm's highest quality tier, ensuring exceptional **microstructural homogeneity, superior internal cleanliness, and optimized thermal fatigue resistance**. This material delivers outstanding performance in demanding high-temperature applications, particularly where extended die life, reliability under thermal cycling, and resistance to heat checking are critical requirements for aluminum and magnesium die-casting, hot extrusion, and forging operations. --- ## **1. Key Characteristics & Advantages** * **Exceptional Thermal Fatigue Resistance:** Superior resistance to heat checking and thermal cracking under cyclic heating and cooling conditions, significantly extending die service life. * **Optimized Microstructural Homogeneity:** Advanced manufacturing ensures uniform carbide distribution and minimal segregation, providing consistent properties throughout the entire cross-section. * **Superior Impact Toughness:** Enhanced fracture resistance at both room and elevated temperatures, reducing susceptibility to catastrophic failure under mechanical shock. * **Excellent High-Temperature Strength (Red Hardness):** Maintains hardness and mechanical properties at operating temperatures up to 600°C (1110°F). * **Minimized Anisotropy:** Reduced directional properties ensure predictable dimensional changes during heat treatment and uniform performance in service. * **Improved Resistance to Heat Checking:** The refined microstructure and optimized chemistry delay the initiation and propagation of thermal cracks. * **Enhanced Solder Resistance:** In die-casting applications, shows improved resistance to aluminum soldering compared to standard H13 grades. --- ## **2. Typical Chemical Composition (Weight %)** | Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | | :--- | :---: | :---: | :---: | :---: | :---: | :---: | | **Content** | **0.37 - 0.42** | **4.80 - 5.50** | **1.20 - 1.50** | **0.90 - 1.10** | **0.90 - 1.10** | **0.35 - 0.55** | **Quality Enhancement through SUPERIOR® Processing:** While maintaining the standard AISI H13 chemical composition range, W302 SUPERIOR® achieves its premium properties through: * **Advanced Melting Practice:** Utilizes special refining techniques (typically ESR - Electro-Slag Remelting or vacuum degassing) to achieve extremely low levels of impurities (sulfur, phosphorus) and non-metallic inclusions. * **Controlled Solidification:** Optimized ingot casting and forging processes ensure uniform carbide size and distribution. * **Stringent Quality Assurance:** Each heat undergoes comprehensive testing including ultrasonic inspection, macro-etch testing, and detailed microstructural evaluation to guarantee internal soundness. --- ## **3. Physical & Mechanical Properties** ### **Physical Properties:** * **Density:** 7.80 g/cm³ * **Thermal Conductivity:** 28.0 W/(m·K) at 20°C * **Modulus of Elasticity:** 210 GPa * **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/K (20-500°C) * **Specific Heat Capacity:** 460 J/(kg·K) ### **Heat Treatment & Mechanical Data:** * **Annealed Hardness:** 190-210 HBW * **Austenitizing Temperature:** 1020-1050°C (1865-1920°F) * **Quenching Medium:** Air or oil (forced air recommended for sections >100mm) * **Tempering:** **Double tempering mandatory.** Range: 540-650°C (1005-1200°F) * **Typical Working Hardness & Applications:** * **44-48 HRC** (tempered at 580-620°C): Optimal for aluminum/magnesium die-casting – maximizes thermal fatigue resistance * **48-52 HRC** (tempered at 540-580°C): For hot extrusion, forging, and high-stress applications requiring higher strength * **Hot Hardness Performance:** Maintains ~40 HRC at 600°C * **Impact Toughness:** Typically 40-50 J (Charpy U-notch) at 46 HRC – superior to standard H13 * **Thermal Fatigue Testing:** Demonstrates 30-50% improvement in heat check resistance compared to conventional H13 --- ## **4. Primary Applications** W302 SUPERIOR® is engineered for the most demanding hot work applications where reliability and extended service life are paramount: * **High-Pressure Die-Casting:** * Cavities, cores, and inserts for aluminum and magnesium automotive components (engine blocks, transmission housings, structural parts) * Nozzles, shot sleeves, and plunger tips * **Hot Extrusion Tools:** * Dies, mandrels, and containers for aluminum and copper alloy extrusion * Tooling for steel extrusion at elevated temperatures * **Hot Forging Dies:** * Dies and inserts for precision forging of automotive and aerospace components * Hammer and press forging tools * **Press Hardening (Hot Stamping):** * Tools for forming ultra-high-strength steel automotive body components * **Plastic Molds:** * Hot runner systems, gates, and nozzles * Molds for high-temperature engineering plastics (PEEK, PEI, PPS) --- ## **5. Relevant International Standards & Comparable Grades** W302 SUPERIOR® meets and exceeds all major international standards for H13-type hot work tool steels: | Standard | Grade / Designation | Quality Comparison | | :--- | :--- | :--- | | **AISI / ASTM A681** | **H13** | W302 SUPERIOR® represents the premium quality tier with enhanced properties | | **DIN / Werkstoff** | **1.2344 (X40CrMoV5-1)** | Superior to standard 1.2344 in cleanliness and thermal fatigue resistance | | **JIS G4404** | **SKD61** | Significantly higher quality with better internal soundness | | **ISO 4957** | **X40CrMoV5-1** | Exceeds standard requirements for homogeneity and toughness | | **GB/T 1299** | **4Cr5MoSiV1** | Premium import alternative with certified superior performance | | **Uddeholm Grades** | **ORVAR® 2** | Similar H13-type grade; W302 SUPERIOR® emphasizes maximum quality consistency | **Quality Distinction:** The **SUPERIOR®** designation guarantees material that has passed Böhler-Uddeholm's most stringent quality controls, including advanced non-destructive testing and microstructural evaluation. --- ## **6. Processing & Fabrication Guidelines** ### **Material Supply & Preparation:** * **Available Forms:** Forged and pre-machined blocks, bars, and custom shapes * **Certification:** Supplied with complete material certificate including chemical analysis, mechanical properties, and ultrasonic test report * **Storage:** Protect from corrosion during storage with appropriate coatings ### **Machining & Heat Treatment:** * **Machining (Annealed State):** Good machinability using carbide tools. Rough machining should leave 1-2mm allowance for finishing after heat treatment * **Stress Relieving:** Recommended after rough machining (600-650°C) * **Heat Treatment Protocol:** 1. **Preheating:** 600-650°C and 850-900°C (dual stage) 2. **Austenitizing:** 1020-1050°C in vacuum or protective atmosphere 3. **Quenching:** Air cooling (forced air for uniform cooling in large sections) 4. **Tempering:** **Immediate double tempering** after reaching 40-50°C * **Finishing:** Final machining/grinding after heat treatment to achieve dimensional accuracy ### **Surface Enhancement & Maintenance:** * **Nitriding:** Highly recommended for die-casting applications (gas, plasma, or salt bath) * Surface hardness: 1000-1200 HV * Case depth: 0.1-0.3mm * Reduces soldering and extends service life 3-5x * **PVD Coatings:** TiAlN, AlCrN for specific applications * **Welding Repair:** Use matching filler (Böhler UDDEHOLM WELDEX H13) * Pre-heat: 400-450°C * Post-weld: Re-harden and temper complete tool ### **Quality Control:** * **Hardness Testing:** Verify uniform hardness throughout tool * **Penetrant Testing:** Recommended after final machining to detect surface defects * **Dimensional Verification:** Account for ~0.1% growth during heat treatment --- ## **7. Economic & Performance Advantages** ### **Life Cycle Benefits:** * **Extended Service Life:** Typically 30-50% longer than standard H13 in equivalent applications * **Reduced Downtime:** Superior thermal fatigue resistance means fewer production interruptions for die maintenance * **Improved Part Quality:** Consistent performance reduces scrap rates and improves dimensional stability * **Lower Total Cost:** Higher initial investment offset by reduced tooling costs per part produced ### **Application-Specific Performance:** * **Die-Casting:** 50,000-150,000 shots typical for aluminum applications (with proper nitriding and maintenance) * **Extrusion:** 20-50% longer run times between die polishing compared to standard H13 * **Forging:** Improved resistance to mechanical and thermal shock in hammer forging applications --- ## **8. Conclusion** **BÖHLER W302 SUPERIOR®** represents the ultimate evolution of H13 hot work tool steel technology, combining the proven chemistry of AISI H13 with state-of-the-art manufacturing processes to deliver unmatched performance in the most demanding thermal cycling applications. The **SUPERIOR®** quality designation is not merely a marketing term but a documented guarantee of exceptional internal cleanliness, microstructural homogeneity, and optimized properties that directly translate to extended tool life and improved process reliability. For die-casters, extruders, and forgers operating in competitive environments where tooling costs, production uptime, and part quality are critical success factors, the investment in W302 SUPERIOR® provides substantial returns through reduced maintenance frequency, extended production runs, and minimized unplanned downtime. When failure is not an option and consistent performance under extreme conditions is required, W302 SUPERIOR® stands as the definitive choice for premium hot work tooling applications worldwide. -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6897 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Bohler-Uddeholm BÖHLER W302 SUPERIOR® Premium H13 Tool Steel Tube -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Tube drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3368 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition